Editorial Technical Reference

Air Distribution Plenum & Nozzles

This page explains how Air Distribution Plenum & Nozzles is classified within Food Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A component of Sterile Air Drying Tunnels that distributes and directs sterile air uniformly across products for drying and sterilization.

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Product Specifications

Technical details and manufacturing context for Air Distribution Plenum & Nozzles

Definition

The Air Distribution Plenum & Nozzles system is an integral part of Sterile Air Drying Tunnels used in food manufacturing. It consists of a pressurized plenum chamber that receives filtered, sterile air and multiple precision nozzles that direct this air in controlled patterns onto products moving through the tunnel. This system ensures uniform air distribution, consistent drying temperatures, and maintains sterility throughout the processing area. The plenum is typically constructed from stainless steel 316L or food-grade polymers, with surface roughness values ranging from 0.4 to 0.8 μm Ra for hygienic finish. Working pressure ranges from 1.0 to 1.6 MPa, and air flow rates from 500 to 2000 m³/h. Air velocity at the nozzles is typically 10–30 m/s, and the temperature range for sterilization is 20–120 °C. Nozzle diameters vary from 2 to 10 mm, with counts of 50–200 per linear meter. The system operates at a pressure drop of 0.05–0.15 MPa and non-condensing humidity of 30–70% RH. Filter rating is 0.2–0.3 μm (ISO 8573-1) to ensure sterile air quality. Weight per meter length is 50–150 kg. These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The system is designed to maintain uniform air distribution and consistent drying conditions, critical for product quality and sterility in food processing.

Working Principle

Filtered sterile air enters the plenum chamber where pressure is equalized, then flows through precisely positioned nozzles that create laminar or turbulent air streams (depending on design) directed onto products. The plenum maintains consistent pressure while nozzles control air velocity, direction, and distribution patterns to optimize drying efficiency and sterility maintenance. The design ensures that air is distributed uniformly across the product surface, preventing uneven drying and maintaining required sterility levels.

Common Materials

Stainless Steel 316L, Food-grade polymers

Technical Parameters

Parameter	Typical range	Notes & selection driver
Air Flow Rate	500–2000 m³/h	Determines drying capacity
Air Velocity	10–30 m/s	Ensures uniform drying
Temperature Range	20–120 °C	Sterilization temperature
Nozzle Diameter	2–10 mm	Affects air distribution
Nozzle Count	50–200 pcs	Per linear meter
Material Grade	304–316L	316L for corrosive environmentsASTM A240
Surface Roughness	0.4–0.8 μm Ra	Hygienic finish
Filter Rating	0.2–0.3 μm	Sterile air qualityISO 8573-1
Pressure Drop	0.05–0.15 MPa	Affects energy consumption
Operating Humidity	30–70 % RH	Non-condensing
Weight	50–150 kg	Per meter length

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Plenum Chamber
Equalizes air pressure and distributes air to multiple nozzles

Material: Stainless Steel 316L
Nozzle Array
Directs and controls air flow patterns onto products

Material: Stainless Steel 316L
Mounting Brackets Part
Secures the system within the drying tunnel

Material: Stainless Steel 304
Sealing Gaskets Part
Maintains airtight connections between components

Material: Food-grade silicone

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Sterile Air Drying Tunnel

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Manufacturers of Air Distribution Plenum & Nozzles

Manufacturer profiles associated with Air Distribution Plenum & Nozzles.

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Frequently Asked Questions

What is the typical working pressure range for this plenum and nozzle system?

The reference working pressure range is 1.0 to 1.6 MPa. However, the actual required pressure depends on the specific tunnel design and product. Always verify with the manufacturer or supplier for your application.

What materials are commonly used for the plenum and nozzles?

Common materials include stainless steel 316L and food-grade polymers. The material grade may vary (e.g., 304 to 316L) depending on corrosion requirements. Confirm the exact material with the supplier.

How does the nozzle diameter affect air distribution?

Nozzle diameter influences air velocity and distribution pattern. The reference range is 2 to 10 mm. Smaller diameters produce higher velocity jets, while larger diameters provide broader coverage. The optimal size depends on the product and drying requirements.

What filter rating is required for sterile air?

The reference filter rating is 0.2 to 0.3 μm, according to ISO 8573-1. This ensures removal of particulates and microorganisms. Verify the filter specification with the supplier to meet your sterility requirements.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 0.5 bar (7.25 psi) differential pressure
flow rate:	100-5000 m³/h (59-2942 CFM) per plenum section
temperature:	Ambient to 150°C (302°F) continuous operation
slurry concentration:	Not applicable - designed for clean, filtered air only

Air Distribution Plenum & Nozzles

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